Correct usage of Stateful Beans with Servlets

Question

We currently have a Stateful bean that is injected into a Servlet. The problem is that sometimes we get a Caused by: javax.ejb.ConcurrentAccessException: SessionBean i

Answer 1

you should never syncronize servlet or ejb access since this cause requests queue and if you have N concurrently users the last one will wait for a long time and often get a timeout response!!! Syncronize method is not intended for this reason!!!